<script setup>
 import { ref } from 'vue'

const count  = ref(200)


const addCount = () => {
    count.value++
}


</script>
<template>
  <!-- 不再限制唯一根元素 -->
<div>
    <button @click="addCount">12dsf3{{count}}</button>
    <!-- <my-son><my-son/> -->
        <My-Son></My-Son>
</div>

</template>
<style lang="scss" scoped>

</style>
